Humira is a prescription medicine made to treat arthritis. However, the manufacturing company, Abbott, failed to disclose the risk that it may cause a life-threatening fungal infection. The company is believed to have known this as far back as 2008, even before warning physicians about its use. Since Humira was released in 2003, many people may be at risk. Numerous lawsuits have already been filed. Other severe side effects include sever nerve damage and lymphoma.